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Author Topic: RPM Gauge Not Working  (Read 3080 times)

October 21, 2010, 05:24:30 pm

91jettaidi

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RPM Gauge Not Working
« on: October 21, 2010, 05:24:30 pm »
Hey guys I have a 1990 Jetta Flair 2 and I swapped a 1.6 TD from a 91 Jetta now there are a couple of little problem but firstly I want to know why the tach is not working. Now I have modified a 1.8 alternator to fit and I connected every thing up right so i'm not sure why its not working. Thanks
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Reply #1October 21, 2010, 05:30:03 pm

Vincent Waldon

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Re: RPM Gauge Not Working
« Reply #1 on: October 21, 2010, 05:30:03 pm »
On diesels the tach is driven by a special terminal from the alternator... if your modifications to the gasser alternator didn't include adding this terminal... thar she blows!!

Search for "W terminal" and you'll find lots of discussion... even a thread or two on adding one to an alternator that doesn't already have it.
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Vince

Edmonton, Alberta, Canada
2001 silver TDI Jetta Malone Stage 1.5 , 2001 blue TDI Jetta SBIII 216s Malone Stage 3, 1970 Bay Window bus

Gone but not forgotten: 1969/1971 Beetles, 1969/1974 Westies, 1979 Rabbit, 1986 TD Jetta, 1992 gas Jetta, 1994 TD Jetta
Reply #2October 21, 2010, 06:12:16 pm

91jettaidi

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Re: RPM Gauge Not Working
« Reply #2 on: October 21, 2010, 06:12:16 pm »
great thank you so much
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